CI only: #2021 regression test WITHOUT the fix (expected to fail)

tests/integration/test_issue_2021.py

@@ -0,0 +1,23 @@
+import asyncio
+
+import pytest
+from bumble.transport.common import Transport
+
+from bleak import BleakScanner
+
+# The kernel stops an LE-only scan after DISCOV_LE_TIMEOUT (10.24 s) and BlueZ
+# restarts it IDLE_DISCOV_TIMEOUT (5 s) later. A stop that arrives while the
+# kernel is between states is rejected and surfaces as InProgress; the window
+# is narrow, so the stop is placed at several points around the restart.
+STOP_AFTER = [10.0, 12.0, 15.0, 15.2, 15.4, 16.0]
+
+
+@pytest.mark.parametrize("stop_after", STOP_AFTER)
+async def test_stop_around_kernel_le_scan_restart(
+    stop_after: float, hci_transport: Transport
+) -> None:
+    """
+    Regression test for <https://github.com/hbldh/bleak/issues/2021>.
+    """
+    async with BleakScanner():
+        await asyncio.sleep(stop_after)